From the article text, it sounds like one of four options is a smartphone application for tracking mileage. This is significantly different from the idea of a d

From the article text, it sounds like one of four options is a smartphone application for tracking mileage. This is significantly different from the idea of a dedicated piece of hardware, which I read your comment to imply. While I agree this would be a perverse outcome, it is not obvious that such a thing would be "required" at all, let alone "at all times". Here's hoping that the option never comes to pass, if for no other reason than its being trivially easy to spoof.